GennadySpb

Checking your Raspberry Pi's view of its power supply

Sometimes it seems like the first (and sometimes only) advice you get offered for almost any problem with a Raspberry Pi is "check your power supply". You think something like:

"hey, I'm using an official power supply sold as being matched with my Pi so how can there be any problem?"

You look up the specs then stick a controlled load across your supply and confirm that it can deliver the required number of Watts.

Yet your problems persist…

Linux Desktop on Apple Silicon in Practice

I bought M1 MacBook Air. It is the fastest computer I have, and I have been a GNOME/GNU/Linux user for long time. It is obvious conclusion that I need practical Linux desktop environment on Apple Silicon.

Fortunately, Linux already works on Apple Silicon/M1. But how practical is it?

Two native ports exist.

QEMU + Ubuntu ARM aarch64

These are the steps I used to get Ubuntu ARM aarch64 running with QEMU on OSX.

Get Ubuntu Image and QEMU EFI:

wget https://cloud-images.ubuntu.com/releases/16.04/release/ubuntu-16.04-server-cloudimg-arm64-uefi1.img
wget https://releases.linaro.org/components/kernel/uefi-linaro/latest/release/qemu64/QEMU_EFI.fd

WannaCry|WannaDecrypt0r NSA-Cyberweapon-Powered Ransomware Worm

Virus Name: WannaCrypt, WannaCry, WanaCrypt0r, WCrypt, WCRY
Vector: All Windows versions before Windows 10 are vulnerable if not patched for MS-17-010. It uses EternalBlue MS17-010 to propagate.
Ransom: between $300 to $600. There is code to 'rm' (delete) files in the virus. Seems to reset if the virus crashes.
Backdooring: The worm loops through every RDP session on a system to run the ransomware as that user. It also installs the DOUBLEPULSAR backdoor. It corrupts shadow volumes to make recovery harder. (source: malwarebytes)
Kill switch: If the website www.iuqerfsodp9ifjaposdfjhgosurijfaewrwergwea.com is up the virus exits instead of infecting the host. (source: malwarebytes). This domain has been sinkholed, stopping the spread of the worm. Will not work if proxied (source).

update: A minor variant of the viru

Prerequisite: latest Docker for Mac on MacOS Sierra

$ brew update
$ brew install --HEAD xhyve
$ brew install docker-machine-driver-xhyve
$ sudo chown root:wheel $(brew --prefix)/opt/docker-machine-driver-xhyve/bin/docker-machine-driver-xhyve
$ sudo chmod u+s $(brew --prefix)/opt/docker-machine-driver-xhyve/bin/docker-machine-driver-xhyve

$ curl -Lo minikube https://storage.googleapis.com/minikube/releases/v0.18.0/minikube-darwin-amd64 &amp;&amp; chmod +x minikube &amp;&amp; sudo mv minikube /usr/local/bin/

	package main

	import (
	"fmt"
	"io"
	"io/ioutil"
	"os"
	"path/filepath"
	"runtime"
	"strings"

	# .circleci/config.yml

	version: 2.1

	jobs:
	# This build job just tests that the binary can build. If your project is a
	# library, not a binary, you don't need this build job. In other words, omit
	# this job if you don't have a func main() in your project.
	build:
	docker:

	tap "ethereum/ethereum"
	tap "heroku/brew"
	tap "homebrew/boneyard"
	tap "homebrew/bundle"
	tap "homebrew/cask"
	tap "homebrew/cask-versions"
	tap "homebrew/core"
	tap "paritytech/paritytech"
	cask "java"
	brew "ansible"

	#!/usr/bin/env bash

	# ldap2json.sh
	#
	# Example shell script showing how to parse LDIF output from the
	# ldapsearch command into a json array. Please note that this
	# script almost certainly does not handle every edge case, and
	# is best used to pull a handful of fields a user or group
	# record in a FreeIPA ldap server and format them as JSON for use
	# in other tools.

	import pathlib
	import re

	SUMMARY_LINE_RE = re.compile(r':(?P<name>\S+) \((?P<code>.+?)\):( \(?P<summary>.+)\)?')


	def parse_summary_line(line):
	line_match = SUMMARY_LINE_RE.match(line)
	if not line_match:
	raise ValueError(f"ill-formed line: {line!r}")